Fire-arch for furnaces.



J. ROSBOROUGH. FIRE ARCH FOR FURNACES. APPLICATION FILED JUNE 4, 1909.

1,086,467. Patented Feb. 10, 1914.

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Patented Feb. 10, 1914.

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J. ROSBOROUG FIRE ARCH FOR PURNA APPLICATION FILED JUNE 4, 1909.

UNITED STATES PATENT OFFICE JOHN BOSBOROUGI-I, OF ST. LOUIS, MISSOURI, ASSIGNOR TO LAOLEDE-GHRISTY CLAY PRODUCTS COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

FIRE-ARCH FOR FURNACES.

To all whom, it may concern: I

Be it known that I, JOHN Rosnonouorr, a citizen of the United States, residing in the city of St. Louis and State of Missouri,

has for its object the providing of a simple,v

economical, and .eflicient fiat fire arch with a refractory roof or lining therefor.

The main object of the invention is to provide a detachable cubical brick of refractory material capable of being used as the lining or that is economical to construed-efficient and durable inoperation, and that may be easily inserted in position or removed therefrom as occasion requlres or necessity demands.

The invention conslsts principally in an integral cubical brick of refractory material to be used as a lining for fiat fire arches, and having a cul-de-sac holding pocket in the upper face thereof.

The invention consists further, and finally,

in the features, combinations, and details of construction hereinafter described and claimed.

In the art to which this invention relates, it has long been desired to provide a fire arch with cubical fire bricks or blocks of refractory material that may be easily and quickly inserted in position and removed therefrom as well as efficient and durable in operation. Many attempts have been made to provide a fire arch of the kind desired with suitable bricks, but so far as shown or known no one has yet reached what may be called the final stage, that is, the last step of simplicity in construction and efficiency in operation. To make such a fire brick or lining for a fiat arch of such construction'is the principal object of this invention, as will hereinafter appear.

In the accompanying drawingsFigure 1 is a sectional elevation of a portion of a Specification of Letters Patent.

roof of a flat fire arch,--one I Patented Feb. 10, 1914..

Application filed June 4, 1909. Serial No. 500,083.

furnace, grate, and fire arch provided with fire bricks or blocks constructed. in accordance with these improvements. Fig. 2 is'a top plan view of a portion of the arch looking at it from above. Fig. 3 is a vertical sectional view taken through a portion of the arch. Fig. 4 is a somewhat enlarged sectional view of one of the cubical blocks or bricks of refractory material of which the arch is composed; and Fig. 5 is a perspectivedetail of one kind of holding bolt, which detachab-ly holds the cubical fire bricks in position. i

In order to give a comprehensive disclosure of this invention, it is thought best to show generally, but not in detail, chain grate mechanism, particularly the framework 10. This framework may be of any usual or desired construction and is provided with supporting wheels or rollers 11, by which it is movably mounted upon guideways or tracks 12, all of the usual construction. The boiler 13, of the tubular type with a water head as shown, is mounted upon the arch .wall 14 in the usual manner.

To form the fire .arch a main supporting I-beam 15 is provided, which is secured to another set of'beams or brackets 16, by which it may be anchored on the side walls of the furnace 17, as shown particularly in Figs. 2 and 3. Bolted to each side of the main supporting I-beam are forwardly and rearwardly extending secondary beams or brackets 18, formed of any desired material, preferably iron, as is usually used for such purposes.

In the case of flat arches it is desirable, and indeed necessary, to provide a satisfactory roof or lining of fire brick or other desired refractory material, and to make it in sections or. pieces that may be easily and readily placed in position inthe first'instance, and as easily and readily moved for purposes of construction, repair, or replaceblock, as shown particularly in Fig. 4. To

hold these blocks in position, each and every of them is provided with what may be termed a cul-de-sac holding pocket in the upper face or surface thereof. The term cul-de-sac is preferably used as it seems to describe best the kind of pocket which is submitted to be a new element in this art, namely, a pocket which opens only through the upper face as shown in the figure, and which is closed at the bottom portion by the refractory material of which the block is composed. This pocket is preferably T-shaped, as shown, so that the block may be loosely and detachably engaged with its holding mechanism, as hereinafter set forth, that is, it has a restricted or contracted upper portion 20 at the exit thereof and an enlarged lower closed portion 21.

To provide holding means for the blocks-means that may be readily inserted or removed from engagement with such blocks, so that the blocks may be inserted or withdrawn from operative position as occasion demands or necessity requires-T-bolts are provided having a head portion 22 and a bolt portion 23, the head portion being relatively T-shaped, as shown in Fig. 5, and the body or bolt portion 23 being cylindrical. These bolts may be provided with threaded end portions, as shown in Fig. 3, or may have the upper portions thereof bent at bolt to be inserted in right angles thereto, as shown at 26 in Figs. 2 and 5. They are so constructed and arranged that they may enter the pocket when .the bolt head is turned in one position and when turned in another position at right angles thereto act to engage with and hold thetblocks in operative position, as shown in Fig. 3. One set of said holding bolts may be passed through perforations, as shown in Fig. 3, and be provided with threaded nuts25 to hold them in operative position, or theholding brackets may be slotted at 24, as shown in Figs. 2 and 3, to permit the T- position or removed therefrom as may be desired; and I desire to be understood as referring to either the perforations or slots when using the term perforation.

1 The cubical blocks are preferably arranged as shown in the drawings so as to leave spacesbetween the adjacent blocks to permit expansion and contraction thereof, due to the extremes of temperature to which the furnace is usually subjected.

To provide additional means for protecting the brackets 18 from the heat of the to pass through the spaces between the blocks, a sheet of asbestos 27, or other fireproof material, is interposed, or may be interposed, between the upper surfaces of said blocks and the lower faces of the supporting brackets, as shown.

It is only necessary, however, that this intermediate sheet of fireproof material should cover the spacesbetween the blocks to protect the I-beams and brackets therefrom.

It will be apparent to those skilled in the art that the cubical fire-brick as hereinabove set forth is not only economical to make and efficient end durable in operation, and acts to protect the brackets from excessive heat as well as storing up energy, but that it also efficiently protects the holding bolt mechanism from the destructive heat action of the furnace. Further, such blocks may be easily inserted in position initially and removed from the excessive heat generated in the furnace.

I claim 1. In a fire arch for furnaces of the class described, the combination of supporting beam mechanism anchored in the side walls of the furnace and provided with perforations or openings in the lower part thereof, a plurality of independent cubical bricks or blocks arranged below said supporting beam mechanism to form a lining therefor, each of said blocks having a cul-de-sac'holding pocket in the upper surface thereof, said cul-de-sac holding pockets being constricted or contracted at the upper part and enlarged at the lower part, and removable T-head holding bolt mechanism for each of said blocks arranged in said cul-de-sac holding pockets and detachably engaging the perforated supporting beam mechanism.

2. In a fire arch for' furnaces of the class described, the combination of supporting beam mechanism anchored in the side walls of the furnace and provided with perforated or slotted flanged lower portions, a plurality of cubical bricks or blocks of fire-brick or other suitable refractory material arranged underneath the supporting beam mechanism to form a lining therefor, each of said blocks having an inverted T-shaped cul-de-sac opening in the upper surface thereof, and a removable substantially T-shaped holding head thereof in engagement with the inverted T-shaped cul-de-sac holding pocket and the body portion in detachable engagement with the perforated supporting beam mechanism. 3. In a furnace, a framework, a series of blocks placed side by side below the framework and adjacent thereto to form a lining for the furnace, each block having a T- shaped cul-de-sac opening on its outer side, and removable T-head bolts for said blocks engaging the respective openings in the blocks, said bolts securing the blocks to the framework. I

4. In a fire arch for furnaces, the combination with a block of refractory material having a pocket formed centrally of its .top

110 bolt for each of said cubical blocks with the tion from said pocket in one position and 5 adapted to be turned to another position at ass as Letters Patent he 1,686

the base of said pocket to prevent its retraction.

In-testimony whereof I have hereunto set my hand and affixed my seal in the presence of the'two subsoribin witnesses.

JOHN ROSB ROUGH. [L. s.] Witnesses:

Fnonnnon D. LnAnnN, WILLIAM MORRIS.-

I It is hereby certified that in LettersPatent No. 1,086,467, granted February 10,

1914;, upon the application. of John Rosborough, of St. Louis, Missouri, for an improvement in Fire-Arches for Furnaces, an error appears in the printed speoi- .fication requiring'correction as follows: Page 3, line 2, for the word blocks read block; and, thatthe said Letters Patent should be read with this correction therein Signed and sealed this 3rd day oii March, DH, 1914.

[snare] that the same inay conform to the record of the casein the Patent Oflice.

' J; r. NEWTON,

Act'i/ng Commissioner of Patents. 

